BSD Operating Systems

FreeBSD Mastery: Jails

Linux, Unix, and BSD Command Line Cross-Reference (Second Edition): A Fat-Free Pocket Guide for *nix Commands (Fat-Free Technology Guides)

FreeBSD Mastery: Specialty Filesystems

Introduction to the Command Line (Third Edition): A Fat-Free Guide to Linux, Unix, and BSD Commands (Fat-Free Technology Guides)

The Design and Implementation of the 4.3Bsd Unix Operating System

FreeBSD Mastery: ZFS (IT Mastery)

Absolute FreeBSD, 3rd Edition: The Complete Guide to FreeBSD

FreeBSD Mastery: Advanced ZFS (IT Mastery)